KR970007007Y1 - Sound absorbing section of a vacuum cleaner - Google Patents

Abstract

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Description

Sound Absorption Structure of Vacuum Cleaner Motor

1 is a front view showing a general cleaner.

2 is a longitudinal sectional view showing a conventional cleaner motor.

3 is a longitudinal sectional view showing a cleaner motor to which a sound absorbing structure according to an embodiment of the present invention is applied.

4 is a longitudinal sectional view showing the sound absorbing member of FIG.

* Description of the symbols for the main parts of the drawings *

31: motor case 39: impeller

43: impeller cover 47: support member

71: diffuser 73: sound absorbing member

The present invention relates to a sound absorbing structure of a cleaner motor.

Generally, as shown in FIG. 1, the cleaner is equipped with a cleaner motor 30 that generates power so as to generate suction power in the cleaner motor 11, and the suction cleaner is sucked by the suction force on the left side of the cleaner motor 30. A dust collecting chamber 15 for collecting dust and the like is formed, and a suction hose 17, a handle 19, and an extension pipe 21 are sequentially connected to one side of the dust collecting chamber 15, and the extension pipe 21 is A rotating tube 23 rotating at a predetermined angle is coupled to the front end, and the bottom of the rotating tube 23 contacts the bottom surface to be cleaned, and dust and the like are sucked by the suction force according to the operation of the cleaner motor 30. It is a structure in which the suction inlet body 25 for suction is coupled.

When the suction port 25 of the conventional vacuum cleaner configured as described above is brought into close contact with the floor to be cleaned, and the operation means (not shown) is operated, the vacuum cleaner motor 30 operates, and the vacuum cleaner motor 30 operates in the air. Suction power is generated. Air containing foreign matter such as dust is sucked into the dust collecting chamber 15 through the suction port 25, the rotary tube 23, the extension tube 21, the handle 19, and the suction hose 17 by the suction force. The foreign matter in the air sucked into the dust collecting chamber 15 is collected in the dust collecting chamber 15 by a filter unit (not shown), and the remaining air passes through the unshown flow path past the cleaner motor 30. It is discharged to air and cleaning is performed.

In the conventional cleaner motor, as shown in FIG. 2, the stator 33 is disposed inside the motor case 31, and the stator 33 rotates by electrical interaction with the stator 33. The rotor 35 is disposed, a motor shaft member 37 is installed inside the rotor 35 so as to rotate together with the rotor 35, and one end of the motor shaft member 37 is air. Impeller 39 which rotates in accordance with the rotation of the motor shaft member 37 is disposed to generate a suction force by the pressure difference of the, the lower side of the impeller 39 is sucked into the cleaner motor by the impeller 39 The diffuser 41 is arranged to reduce the speed of air.

In addition, the impeller cover 43 is fixed to the upper end of the motor case 31 by the fixing means (not shown) to protect the impeller 39 from the outside and guide the air flowing into the cleaner motor. 39 and the diffuser 41, and the support member 47 has a plurality of openings formed at the upper end of the motor case 31 to support the upper portion of the motor shaft member 37 via the bearing 45 as a medium. It is fixed by the fastening member 49, the power supply means 51 is provided in the lower portion of the motor case 31 to supply power to the stator 33 and the rotor 35.

In the central portion of the lower surface of the motor case 31 is formed a bearing accommodating portion 31a for accommodating the bearing 53 so as to support the lower portion of the motor case 37 by rotating the bearing 53 as a medium. Outflow holes 31b are formed around the bearing housing portion 31a to allow air to flow out of the motor case 31, and the support member 47 contacts the upper end of the motor case 31. The wall of the motor case 31 is bent to form a base portion 31c which is bent to form a plane.

An air inlet 39a is formed in the impeller 39 so that air flows into the impeller 39 at the center of the upper surface thereof, and air flows out of the impeller 39 on the side of the impeller 39. The outlet 39b is formed.

An air inlet 41a is formed at an upper edge of the diffuser 41 so that air flowing out of the air outlet 39b of the impeller 39 flows into the diffuser 41, and the inside of the diffuser 41 is formed. In order to reduce the speed of air, a plurality of blocking members 41b are integrally disposed in the diffuser 41 and a large space is formed.

An inlet hole 43a is formed at the center of the upper surface of the impeller cover 43 to allow air to flow into the cleaner motor.

The support member 47 is generally disc-shaped, and a bearing accommodation portion 47a is formed at the center thereof to accommodate the bearing 45, and the bearing accommodation portion 47a and the base portion of the support member 47 are formed. A plurality of through holes 47c are formed between 31c) so that air passing through the diffuser 41 flows into the motor case 31.

The power supply means 51 is electrically connected to the contact portion 54 disposed on the outer circumferential surface of the motor case 37 so as to be in electrical contact with the stator 33 and the rotor 35. A plurality of wires 55 to be provided, an accommodating member 57 accommodating each electric wire 55 to protect the electric wire 55, and the accommodating member 57 so as to firmly support the accommodating member 57. It consists of a plurality of support (61) received and supported by the fastening member 59 to the outer peripheral surface of the motor case (31).

When power is supplied to the stator 33 and the rotor 35 by the contact portion 54 through the wire 55 of the conventional cleaner motor configured as described above, the stator 33 and the rotor 35 are electrically The rotor 35 is rotated to generate a rotational force, and the motor shaft member 37 and the motor shaft member 37 fixed to the rotor 35 and the rotor 35 by the rotational force. The impeller 39 fixed at one end thereof rotates via the bearings 35 and 53 as a medium, and the air inlet 39a and the air outlet 39b of the impeller 39 are rotated by the impeller 39. The pressure difference of the air is generated between them, and the suction force is generated by the pressure difference of the air.

By the suction force, air passes through the suction hole 43a of the impeller cover 43 and passes through the inside of the impeller 39, and then flows into the diffuser 41 through the air inlet 41a of the diffuser 41. do.

The air flowing into the diffuser 41 decreases in speed by colliding with the blocking member 41b and the inner wall of the diffuser 41. In addition, since the space having a larger cross-sectional area is formed in the diffuser 41 than the cross-sectional area of the air inlet 41a of the diffuser 41, the velocity of air introduced into the diffuser 41 by the continuous equation of the fluid is Decrease even more. The continuous equation of the fluid is the law that the velocity of the fluid flowing in a certain flow path is inversely proportional to the cross-sectional area of the flow path.

The air decelerated while passing through the diffuser 41 flows into the motor case 31 through the through hole 47c of the support member 47, and then cools the stator 33 and the rotor 35. While flowing out of the cleaner motor via the outlet hole 31b.

However, in the conventional cleaner motor configured as described above, the air sucked into the impeller 39 flows out at a high speed through the air outlet 39b of the impeller 39, so that noise is generated when it hits the inner wall of the impeller cover 43. As well as air generated in the diffuser 41 hits the blocking member 41b and the inner wall of the diffuser 41, a very loud noise is generated, most of the noise in the motor case 31 Gina was delivered to the outside, so there was a problem that the environment is not comfortable.

Therefore, the present invention has been made to solve the above problems as described above, the object of the present invention is the sound absorbing structure of the vacuum cleaner motor that effectively reduces the noise generated by the motor case and diffuser by disposing the sound absorbing member to the outside of the diffuser To provide.

Sound absorbing structure of the cleaner motor according to the present invention made to achieve the above object is an impeller disposed on one end of the motor shaft member, and the cleaner motor to guide the air flowing into the cleaner motor while protecting the impeller from the outside A cleaner motor having an impeller cover disposed on an upper portion of the vacuum cleaner, wherein a diffuser is disposed below the impeller so as to reduce the speed of air sucked into the cleaner motor by the impeller, and a diffuser is disposed on the air impinging on the impeller cover and the diffuser. A sound absorbing member is disposed on the outside of the diffuser so as to reduce noise generated by the diffuser.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the part same as the part shown in FIG. 2, and the overlapping description is abbreviate | omitted.

As shown in FIG. 3, an impeller 39 is disposed at one end of the motor shaft member 37 of the cleaner motor, and the air is introduced into the cleaner motor while protecting the impeller 39 from the outside. An impeller cover 43 is disposed at the upper portion of the cleaner motor, and a diffuser 71 is disposed at the lower side of the impeller 39 so as to reduce the speed of the air sucked into the cleaner motor by the impeller 39. The sound absorbing member 73 is disposed outside the diffuser 71 so as to reduce noise generated by the air impinging on the impeller cover 43 and the diffuser 71.

That is, at one end of the upper motor shaft member 37 of the cleaner motor, the impeller 39 which rotates in accordance with the rotation of the motor shaft member 37 to generate suction force by the pressure difference of air is disposed. The diffuser 71 is disposed below the impeller 39 so as to reduce the speed of the air sucked into the cleaner motor by the impeller 39, and protects the impeller 39 from the outside and inside the cleaner motor. The impeller cover 43 is fixed to the upper end of the motor case 31 by fixing means (not shown) to guide the incoming air, covering the impeller 39 and the diffuser 71, and the motor case 31. The support member 47 is fixed by a plurality of fastening members 49 to support the upper portion of the motor shaft member 37 via the bearing 45 as an opening formed at the upper end of the impeller cover 43. ) And diffuser ( A sound absorbing member 73 is disposed between the diffuser 71 and the support member 47 so as to reduce noise generated by the air striking 71.

An air inlet 71a is formed at the upper edge of the diffuser 71 so that air flowing out of the air outlet 39b of the impeller 39 flows into the diffuser 71. In order to reduce the speed of air, a plurality of blocking members 71b are integrally disposed in the diffuser 71 and a large space is formed therein.

The sound absorbing member 73 is attached to the base portion 31c of the motor case 31 by attaching means (not shown), and passes through the through hole 47c of the supporting member 47 to stator 33 and The donut shape is made thin so as not to completely block the flow of air cooling the rotor 35.

In addition, the material of the sound absorbing member 73 is made of sponge, etc., and the outer circumferential surface of the sound absorbing member 73 is generally close to the inner surface of the impeller cover 43 so as to optimally satisfy the noise prevention and cooling effect of the air at the same time. The inner circumferential surface of the sound absorbing member 73 is generally located at the center of the through hole 47c of the support member 47, and the thickness of the sound absorbing member 73 is approximately 3-4 mm.

In the cleaner motor to which the sound absorbing structure is applied according to an embodiment of the present invention configured as described above, the air introduced into the impeller 39 by the suction force generated by the impeller 39 is the impeller 39 is an air outlet ( After flowing out at high speed through 39b), the speed decreases through the diffuser 71, and then flows into the motor case 31 through the through-hole 47c of the support member 47 to stator 33 and Cooling the rotor 35 flows out of the motor case 31.

At this time, the air flows out at a high speed through the air outlet 39b of the impeller 39, so that the air hits the inner wall of the impeller cover 43, not only generates noise, but also the air introduced into the diffuser 71 is blocked. A very loud noise is generated by hitting 71b and the inner wall of the diffuser 71. The noise is absorbed and reduced by the sound absorbing member 73 disposed below the diffuser 71.

In addition, the sound absorbing member 73 has a donut shape, and its outer circumferential surface is generally close to the inner surface of the impeller cover 43, and its inner circumferential surface is generally located at the center of the through hole 47c of the support member 47. Since the flow of air for cooling the 33 and the rotor 35 is not completely blocked, noise prevention and cooling effects are optimally satisfied at the same time.

The sound absorbing member according to the embodiment of the present invention is attached to the lower side of the diffuser as a doughnut shape, but the suction member may be appropriately changed according to each shape of the motor case and the diffuser impeller cover, as well as the inner surface of the impeller cover. Of course, it can be installed on the back.

As described above, the sound absorbing structure of the cleaner motor according to the present invention is a very practical design that makes the environment comfortable by effectively reducing the noise generated by the motor case and the diffuser by disposing the sound absorbing member outside the diffuser.

Claims (3)

An impeller 39 disposed on one end of the motor shaft member 37 and an impeller cover 43 disposed on the upper portion of the cleaner motor to guide the air flowing into the cleaner motor while protecting the impeller 39 from the outside. In the cleaner motor provided with a diffuser, a diffuser (71) is disposed below the impeller (39) to reduce the speed of air sucked into the cleaner motor by the impeller (39), and the impeller cover (43) and the diffuser. The sound absorbing member 73 is disposed outside the diffuser 71 so as to reduce the noise generated by the air striking the diffuser 71 so as to reduce the noise generated by the air striking the 71. Sound-absorbing structure of vacuum cleaner motor. The method of claim 1, wherein the sound absorbing member 73 has a thin donut shape so as not to completely block the flow of air that passes through the through hole 47c of the support member 47 and cools the inside of the cleaner motor. Sound-absorbing structure of vacuum cleaner motor. 3. The sound absorbing member (73) according to claim 2, wherein the outer circumferential surface thereof is close to the inner surface of the impeller cover (43) and the inner circumferential surface of the support member (47) to optimally satisfy the noise prevention and cooling effect of the air at the same time. A sound absorbing structure of a vacuum cleaner motor, characterized in that it is sized at the center of the through-hole 47c and its thickness is 3-4 mm.